Machine for drawing bars or rods



2 SheetsSheet 1. P. M. HAAS;v & O. S. BUTTON. MACHINE FOR DRAWING BARS0R RODS.

Patented May 29 (No Model.)

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P. M. HAAS & 0. s. BUTTON.- MAGHINE FOR DRAWING BARS OR RODS.

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UNITED STATES PATENT FFICE.

PHILIP M. HAAS AND CHARLES SEYMOUR DUTTON, OF YOUNGSTOWN,

- OHIO.

MACHINE FOR DRAWING BARS OR RODS.

SPECIFICATION forming part of Letters Patent No. 520,592, dated May 29,1894. Application filed July 19,1893. Serial No. 480.873. (No model.)

To 60% whom it may concern.-

Be it known that we, PHILIP M. HAAS and CHARLES SEYMOUR DUTToN, citizensof the United States, residing at Youngstown, in the county of Mahoningand State of Ohio, have invented or discovered certain new and usefulImprovements in Drawing-Machines, of which improvements the following isa specification.

The invention described herein relates to certain improvements inmechanism for drawing metal bars or rods, and has for its object such aconstruction and arrangement of mech- 'anisms for forcing the die overthe end of a barror rod and for pulling the rod or bar through the die,the mechanisms being so arranged that both operations may proceedsimultaneously on different bars or rods, and

- that a bar or rod with the die applied may be readily transferred fromthe forcing to the pulling mechanism.

In general terms, the invention consists in the construction andcombination substantially as hereinafter more fully described andclaimed. V v

In the accompanying drawings forming a tion.

Fig. 4 is a transverse section, the plane of section being. indicated bythe line ac, :20, Fig. 1, Fig. 5 is an I elevation illustrating amodification of the mechanism for applying the dies in the end of thebar, and Fig.6 is a sectional elevation, the plane of section beingindicated by the line y, 3 Fig. 1.

In the practice of our. invention, one of a series of two or more diesof each size of rod or bar to be drawn, is forced over the end of a baror rodwithout any previous reduction of such end, sufficiently far topermit of the grippers of the pulling mechanism, to take a firm gripupon the protruding end. Thendie thereto. While the baris beingdrawnthrough the first die, by the pulling mechanism, another die is beingapplied to another rod or bar by the forcing mechanism. As bothoperations are carried on simultaneously a considerable saving of timeis effected.

The bar to be drawn is so placed within the grippers 1, suitablyarranged within the standard 2, that when said grippers shall have takena firm grip upon the bar, a sufficient portion thereof will projectbeyond the standard 2, to permit of the die 3 being forced a suitabledistance upon the bar, 2'. e. ten or twelve inches, more or less, topermit the grippers of the pulling mechanism to take a firm grip on theprojecting end of the bar, as hereinafter described. In line with thestandard 2 is placed another standard 4., provided with a fluid pressurecylinder firmly attached thereto, or preferably formed therein, as shownin Fig. 2. As soon as the grippers l have taken a firm hold upon thebar, the drawing die 3 is interposed between the projecting end of thebar, and the piston 5 of the fluid pressure cylinder which is thenforced out by the admission of fluid pressure. The outward movement ofthe piston 5 presses the die 3 over the end of the bar, and the end ofthe bar passes into a recess formed in the piston 5, as indicated bydotted lines in Fig. 2. In order to support the die 3 in properalignment with the bar prior to its being pressed upon the same, anadjustable shelf 6 is arranged along the front of the standard 4, and isextended along the front face of the front abutment 7 of the pullingmachine proper, the press or forcing mechanism just described beingpreferably arranged alongside of the drawing mechanism so as to permitof the lateral movement of the bar with the die from the press mechanismto the drawing mechan-' ism, as shown in Fig. 2. In order'to permit ofthe lateral movement of the bar with its die, the standard 2 islaterally slotted, as

shown in Fig. 3, and the grippers 1 are so ar- 5 efiected by means ofinclined ribs 9, formed on the standards 2, and engaging grooves in thesides of the grippers. The standards 2 and 4 are preferably held inproper relation to each other by means of a tie bar 10, as shown in Fig.1.

In lieu of the construction heretofore described for applying the die 3to the bar, the construction shown in Fig. 5 may be employed. In thisconstruction the fluid pressure cylinder is formed in the rear side ofthe standard 4, and the piston 5 is provided with a cross-head 11, towhich are secured rods 12,, extending through the standard 4, whichserves as a guide for the said rods, and are connected at their oppositeends to a crosshead 13, in which are mounted the grippers 1. In thisconstruction, the bar to be drawn is pulled into the die 3, which restsagainst the standard 4:, being supported in proper relation to the barby the shelf 6. A suitable opening is formed in the standard 4, for thereception of the projecting end of the bar as it is forced through thedie.

After the die has been forced upon the bar as described, the grippers 1are opened, and the bar is shifted by a rolling motion, the drawingdiebeing circular, until the bar is in line with the opening in thestandard or abutment 7, when the bar is moved longitudinally until thedie rests against said standardor abutment, and the proj ec'ting end ofthe bar passes through the opening in the standard 7". It is preferredto. providea stop on the standard 7, so as to arrest the movement of thebar and the die 3 when the former is in line with the opening in thestandard. The grippers 15-are then applied to. the protruding end of thebar, and the latter is drawn through the die 3, by means of the pullingtruck, which is connected to an endless chain. v

As soon as. the bar or rod with the die applied thereto has been shiftedto the pulling or drawing mechanism, another bar or red is: placed inposition in the grippers 1 and a second die forced over the end thereofin the manner described. This pulling truck consists of side frames 16,united by a web 17, the. side pieces and web being preferably formedintegral with each other, as shown in Fig. 4:. As shown in Figs. 1 andl, the side pieces are provided at their lower corners with wheels ordisks 18, mounted on suitable journals extending from the side pieces,and

less chain 24. This chain is arranged to passaround sprocket wheels 26and 27, arranged at the ends of the frame of the machine. The sprocketwheel 27 is arranged upon a shaft 28, on which is also mounted a wormwheel 29, intermeshing with a worm 30, formed on the power shaft of themachine. As soon as the bar and die 3 have been arranged as described,with the end of the bar protruding through the front standard orabutment 7, the pulling truck is run to the front end of the machine,and the grippers 15 are applied to such protruding ends. The hooks 23are then swung down so as to engage one of the cross-bars of the endlesschain 24, whereby the truck is pulled to the rear of the machine.

As soon as the truck has reached the rear limit of its movement,thehooksare released and the pulling truck run to the front of themachine again, so as totake a new grip upon the bar. I

It will be observed by reference tov Fig. 2, that the gripperslehaveinclined outer faces and are arranged within a slot in the swingingframe 21, having inclined walls, so that when the truck is being movedby the chain toward the rear of the machine, the inclined walls of thegrippers and the. swinging frame will cause the grippers to take a firm,tight grip upon the bar. But when the truck is shifted toward the frontof the. machine, the grippers will be loosened from their hold, and canslide freely over the bar. Byreference to Fig. 2, it will be seen thatthe hooks 23, are arranged on opposite sides ofthe. bar, so that thelatter will not, when, by the contin ued operation of the. machine, itextends beyond the hooks, interfere with their vertical movement inbeing released from and connected to the chain.

As will be readily understood by those skilled in the art, the pull ofthe chain will tend to raise the front end of the truck, and

correspondingly shift the upper rear corner of the same, to which thegripping mechanism is attached. If the gripping mechanism were rigidlyconnected to the pulling truck,

this tipping of the latter would tend to. produce a kink in the bar.But, by pivoting the swinging frame to the truck, and arranging thepivotal point of the frame in linewith the center of thet-ippingmovement of the truck, 4 e. the wheel or disk at thelower rearcorner of the truck, .no movement will beimparted to the swinging frameby this tipping l of the truck. arranged tomove along in ways formed bythe The gripping dies 1, are formed with two oppositesides inclined, asshown in, Fig. 1, and two sides of their seat in the standard 2,

are similarly inclined, so that the grippers will take a firm hold uponthebanas the piston 5 is pushing the die. through upon the.

end of the bar. The grippers. '1 are similarly secured in the cross-headl3, in the modification shown in Fig. 5.

It is-eharacteristic of our improved machine that no change inadjustment of any of the parts is necessary in drawing diderent sizes ofrods or bars, only the drawing dies need be changed. Hence, it ispossible that difierent sizes of rods may be alternately fed to themachine without any delay in the operation thereof. a

- While we have described and shown with some degree of particularity aform of mechanism for drawing rods, no claim is made herein to suchdrawing mechanism, as the same forms the subject matter of anapplication to be filed in due time. It will be understood that while itis preferred to employ the construction of drawing mechanism shown anddescribed, any other suitable drawing mechanism may be employed inconnection and in combination with the mechanism for forcing the dieonto the end of the rod.

We claim herein as our invention- 1. A machine for drawing bars, rods,&c., comprising mechanism for forcing a die over the end of a bar or rodsufficiently to permit of the application of a gripping mechanism to theprotruding end of the bar or rod, and mechanism for pulling the bar orrod through the die, the forcing and pulling mechanism being arranged insuitable relation to each other with reference to the simultaneousoperation of both mechanisms simultaneously on different rods and alsofor the convenient and ready transfer of a bar or rod with a die forcedover its end from the forcing to the pulling mechanism, substantially asset forth.

2. In a machine for drawing bars and rods,

the combination of a laterally slotted standard, grippers arranged insaid standard for rigidly clamping and holding the bar or rod, a supportfor holding the die in line with the rod or bar when held by thegrippers and the forcing to the drawing mechanism, sub-.

stantially as set forth.

4. In a machine for drawing rods, bars, 850., the combination ofgrippers for rigidly clamping and holding the bar or rod and a fluidpressure cylinder and piston arranged to force the drawing die over theend of the bar to be drawn, substantially as set forth.

5. In a machine for drawing bars, rods, &c., the combination ofstationary grippers and, a fluid pressure cylinder and' piston arrangedto force the drawing die over the end of the bar to be drawn, the pistonbeing provided with an opening for the reception of the end of the bar,substantially as set forth.

6. A machine for drawing bars, rods, 850., comprising a laterallyslotted standard, grippers arranged in said standard, a fluid pressurecylinder and piston, drawing mechanism, and a support for the die andbar, extending from the pressing mechanism to the drawing mechanism,substantially as set forth.

In testimony whereof we have hereunto set our hands.

\Vitnesses:

W. A. BEEOHER, O. F. WALKER.

